<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
  <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
  <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
  <script src="https://cdn.staticfile.org/jquery/2.1.4/jquery.min.js"></script>
</head>

<body>
  <div id="example"></div>
  <script type="text/babel">
    class Popper extends React.Component {
      constructor(props) {
        super(props);
        this.state = { isGoing: true, numberOfGuests: 2 };
        this.handleChange = this.handleChange.bind(this);
      }

      handleChange(event) {
        console.log(event.target)
        const target = event.target;
        const value = target.type === 'checkbox' ? target.checked : target.value;
        const name = target.name;

        this.setState({
          [name]: value
        });
      }
      render() {
        return (
          <form onSubmit={this.handleSubmit}>
            <label>
              是否离开:
              <input
                name="isGoing"
                type="checkbox"
                checked={this.state.isGoing}
                onChange={this.handleChange} />
            </label>
            <br />
            <label>
              访客数:
              <input
                name="numberOfGuests"
                type="number"
                value={this.state.numberOfGuests}
                onChange={this.handleChange} />
            </label>
          </form>
        );
      }
    }
    ReactDOM.render(
      <Popper />,
      document.getElementById('example')
    );
  </script>
</body>

</html>